The adjective transient means a situation that lasts only a short time or is constantly changing.
Synonyms are temporary, ephemeral, fleeting, or short-term.
The word origins from Latin (16th century) transientem meaning “passing over or away”, present participle of transire meaning “cross over, go over, pass over, hasten over, pass away”. It is derived from its assimilated form of trans meaning “across, beyond” plus ire meaning “to go”.
Its symptoms are transient but can be painful to some.
Romance is transient in nature but true love is eternal.
That was just a temporary option at a transient time for the people in my country.